Imaging lens module and electronic device

ABSTRACT

An imaging lens module includes a plastic barrel, an optical lens assembly and a glue material. The plastic barrel includes an outer object-end surface, an outer image-end surface and an inner tube surface. The inner tube surface connects the outer object-end surface and the outer image-end surface, and includes a plurality of parallel inner surfaces. A plurality of stripe structures are disposed on and protruded from at least one of the parallel inner surfaces, wherein the stripe structures are regularly arranged along a circumferential direction of the parallel inner surface. The optical lens assembly includes a plurality of optical elements disposed in the plastic barrel and arranged along the optical axis, wherein an outer annular surface of at least one of the optical elements is disposed correspondingly to the stripe structures. The glue material is applied among the outer annular surface and the stripe structures.

RELATED APPLICATIONS

The present application is a continuation of the application Ser. No.16/128,598, filed on Sep. 12, 2018, which is a continuation of theapplication Ser. No. 15/431,827, filed on Feb. 14, 2017, U.S. Pat. No.10,101,557 issued on Oct. 16, 2018, and claims priority to Taiwanapplication serial number 105136001, filed on Nov. 4, 2016, the entirecontents of which are hereby incorporated herein by reference.

BACKGROUND Technical Field

The present disclosure relates to an imaging lens module. Moreparticularly, the present disclosure relates to an imaging lens modulewhich is applicable to portable electronic devices.

Description of Related Art

Along with the popularization of personal electronic products and mobilecommunication products (such as mobile phones and tablets) havingimaging devices, miniaturized imaging lens modules have beencorrespondingly risen and developed, and the demands of miniaturizedimaging lens modules having high resolution and great imaging qualitysignificantly increased as well.

During the assembling process of imaging lens modules, the gluematerials are generally applied between the plastic barrel and opticalelements to fix the location of the optical elements or the entireoptical lens assembly. However, the narrow gap and the shaping surfaceproperties between the plastic barrel and the optical elements increasethe difficulty of applying the glue materials, and even the appearancesof the imaging lens modules are affected by the bumps caused by thepartially overflowed glue materials. Therefore, an imaging lens modulewith a controllable application range of glue materials, whilefacilitating uniform application of the glue materials and satisfyingdemands of mass productions is urgently needed.

SUMMARY

According to one aspect of the present disclosure, an imaging lensmodule includes a plastic barrel, an optical lens assembly, and a gluematerial. The plastic barrel includes an outer object-end surface, anouter image-end surface, and an inner tube surface. The outer object-endsurface is a surface of the plastic barrel facing an imaged object, andthe outer object-end surface surrounds an object-end opening. The outerimage-end surface is a surface of the plastic barrel facing an imagesurface, and the outer image-end surface surrounds an image-end opening.The inner tube surface connects with the outer object-end surface andthe outer image-end surface and faces an optical axis of the imaginglens module. The inner tube surface includes a plurality of parallelinner surfaces, and vertical distances between all locations of each ofthe parallel inner surfaces and the optical axis are the same. Aplurality of stripe structures are disposed on and protruded from atleast one of the parallel inner surfaces, and the stripe structures areregularly arranged along a circumferential direction of the at least oneof the parallel inner surfaces. The optical lens assembly includes aplurality of optical elements disposed in the plastic barrel andarranged along the optical axis. An outer annular surface of at leastone of the optical elements is disposed correspondingly to the stripestructures. A glue material is applied among the outer annular surfaceand the stripe structures.

According to another aspect of the present disclosure, an electronicdevice includes the aforementioned imaging lens module and an imagesensor, wherein the image sensor is disposed on the image surface of theimaging lens module.

According to another aspect of the present disclosure, an imaging lensmodule includes a plastic barrel, an optical lens assembly, and a gluematerial. The plastic barrel includes an outer object-end surface, anouter image-end surface, and an inner tube surface. The outer object-endsurface is a surface of the plastic barrel facing an imaged object, andthe outer object-end surface surrounds an object-end opening. The outerimage-end surface is a surface of the plastic barrel facing an imagesurface, and the outer image-end surface surrounds an image-end opening.The inner tube surface connects with the outer object-end surface andthe outer image-end surface and faces an optical axis of the imaginglens module. The inner tube surface includes a plurality of parallelinner surfaces, and vertical distances between all locations of each ofthe parallel inner surfaces and the optical axis are the same. Theoptical lens assembly includes a plurality of optical elements disposedin the plastic barrel and arranged along the optical axis, wherein aplurality of stripe structures are disposed on and protruded from anouter annular surface of at least one of the optical elements, and thestripe structures are regularly arranged along a circumferentialdirection of the outer annular surface, and at least one of the parallelinner surfaces is disposed correspondingly to the stripe structures. Aglue material is applied among the parallel inner surfaces and thestripe structures.

According to another aspect of the present disclosure, an electronicdevice includes the aforementioned imaging lens module and an imagesensor, wherein the image sensor is disposed on the image surface of theimaging lens module.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1A is a schematic view of an imaging lens module according to the1st embodiment of the present disclosure;

FIG. 1B is a cross-sectional view according to the cross-sectional line1B-1B of FIG. 1A;

FIG. 10 is a 3-D view of the imaging lens module according to the 1stembodiment;

FIG. 1D is an exploded view of the plastic barrel and the optical lensassembly according to the 1st embodiment;

FIG. 1E is a 3-D view of the plastic barrel according to the 1stembodiment;

FIG. 1F is a schematic view of the plastic barrel according to the 1stembodiment;

FIG. 1G is a plane view of the plastic barrel according to the 1stembodiment;

FIG. 1H is a schematic view of the stripe structures and the opticalelement according to the 1st embodiment;

FIG. 1I is a schematic view of applying the glue material according tothe 1st embodiment;

FIG. 1J is another schematic view of applying the glue materialaccording to the 1st embodiment;

FIG. 2A is a schematic view of an imaging lens module according to the2nd embodiment of the present disclosure;

FIG. 2B is a schematic view of the plastic barrel according to the 2ndembodiment;

FIG. 2C is a plane view of the plastic barrel according to the 2ndembodiment;

FIG. 3A is a schematic view of an imaging lens module according to the3rd embodiment of the present disclosure;

FIG. 3B is a schematic view of the plastic barrel according to the 3rdembodiment;

FIG. 3C is a plane view of the plastic barrel according to the 3rdembodiment;

FIG. 4A is a schematic view of an imaging lens module according to the4th embodiment of the present disclosure;

FIG. 4B is a schematic view of the plastic barrel according to the 4thembodiment;

FIG. 4C is a plane view of the plastic barrel according to the 4thembodiment;

FIG. 5A is a schematic view of an imaging lens module according to the5th embodiment of the present disclosure;

FIG. 5B is a cross-sectional view according to the cross-sectional line5B-5B of FIG. 5A;

FIG. 5C is a cross-sectional view according to the cross-sectional line5C-5C of FIG. 5A;

FIG. 5D is an exploded view of the plastic barrel and the optical lensassembly according to the 5th embodiment;

FIG. 5E is a 3-D view of the optical element according to the 5thembodiment;

FIG. 5F is a plane view of FIG. 5E;

FIG. 5G is another 3-D view of the optical element in the 5thembodiment;

FIG. 5H is a plane view of FIG. 5G.

FIG. 5I is a schematic view of the stripe structures and the plasticbarrel according to the 5th embodiment;

FIG. 6A is a schematic view of an electronic device according to the 6thembodiment of the present disclosure;

FIG. 6B is another schematic view of the electronic device according tothe 6th embodiment of the present disclosure;

FIG. 6C is a block view of the electronic device according to the 6thembodiment;

FIG. 7 is a schematic view of an electronic device according to the 7thembodiment of the present disclosure; and

FIG. 8 is a schematic view of an electronic device according to the 8thembodiment of the present disclosure.

DETAILED DESCRIPTION 1st Embodiment

FIG. 1A is a schematic view of an imaging lens module 100 according tothe 1st embodiment of the present disclosure, and FIG. 1B is across-sectional view according to the cross-sectional line 1B-1B of FIG.1A. In FIG. 1A and FIG. 1B, the imaging lens module 100 includes anoptical lens assembly 110, a plastic barrel 160, and a glue material150. The imaging lens module 100 can further include a filter (notshown) and an image surface (not shown).

FIG. 10 is a 3-D view of the imaging lens module 100 according to the1st embodiment, and FIG. 1D is an exploded view of the plastic barrel160 and the optical lens assembly 110 according to the 1st embodiment.In FIG. 1A to FIG. 1D, the optical lens assembly 110 includes aplurality of optical elements 111-122, and the optical elements 111-122are disposed in the plastic barrel 160 and arranged along an opticalaxis of the imaging lens module 100. In the 1st embodiment, the opticallens assembly 110 includes, from an object side to an image side, theoptical elements 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121,and 122, and the optical elements 111-122 are disposed in the plasticbarrel 160 and arranged along an optical axis, wherein the opticalelements 111, 113, 115, 117, 119, and 121 are lens elements, the opticalelements 112, 114, 116, 118, and 120 are light blocking sheets, and theoptical element 122 is a spacer.

FIG. 1E illustrates a 3-D view of the plastic barrel 160 according tothe 1st embodiment, and FIG. 1F illustrates a schematic view of theplastic barrel 160 according to the 1st embodiment. In FIG. 1E and FIG.1F, the plastic barrel 160 includes an outer object-end surface 170, anouter image-end surface 180, and an inner tube surface 190. The outerobject-end surface 170 is a surface of the plastic barrel 160 facing animaged object (not shown), and the outer object-end surface 170surrounds an object-end opening 173. The outer image-end surface 180 isa surface of the plastic barrel 160 facing an image surface, and theouter image-end surface 180 surrounds an image-end opening 183.

FIG. 1G illustrates a plane view of the plastic barrel 160 according tothe 1st embodiment. In FIG. 1E to FIG. 1G, the inner tube surface 190connects the outer object-end surface 170 and the outer image-endsurface 180, and faces the optical axis of the imaging lens module 100.The inner tube surface 190 includes a plurality of parallel innersurfaces 195, and vertical distances between all locations of each ofthe parallel inner surfaces 195 and the optical axis are the same. Aplurality of stripe structures 199 are disposed on and protruded from atleast one of the parallel inner surfaces 195, and the stripe structures199 are regularly arranged along a circumferential direction of theparallel inner surfaces 195.

According to the 1st embodiment in FIG. 1G, each of the stripestructures 199 protrudes from the parallel inner surfaces 195 in anangle nearly vertical. Depending on the molding and release propertiesof the stripe structures 199, each of the stripe structures 199 canprotrude from the parallel inner surfaces 195 in a round angle, or theparallel inner surfaces 195 between the adjacent stripe structures 199have an arc feature being slightly recessed. Alternatively, across-section of each of the stripe structures 199 appears to be atrapezoid with a wide bottom and a narrow top, but the disclosure is notlimited thereto.

FIG. 1H is a schematic view of the stripe structures 199 and the opticalelement 122 according to the 1st embodiment. In FIG. 1B, FIG. 10, andFIG. 1H, the outer annular surface 130 of the optical element 122 isdisposed correspondingly to the stripe structures 199, or it can also besaid that the stripe structures 199 are disposed correspondingly to theouter annular surface 130. The glue material 150 is applied between theouter annular surface 130 and the stripe structures 199, or it can alsobe said that the glue material 150 is applied among the outer annularsurface 130, the stripe structures 199 and the aforementioned parallelinner surfaces 195, wherein the glue material 150 is an adhesive whosematerial is not limited. Accordingly, the application range control ofthe glue material 150 and the uniform application of the glue material150 can be facilitated, and the demands of mass productions of theimaging lens module 100 can be satisfied. In addition, the appearance ofthe imaging lens module 100 can be prevented from being affected by thebumps caused by the partially overflowed glue material 150. In otherembodiments (not shown), a plurality of stripe structures can bedisposed on and protruded from two or more parallel inner surfaces ofthe inner tube surface, and the stripe structures are regularly arrangedalong a circumferential direction of the parallel inner surfaces. Outerannular surfaces of two or more optical elements are disposedcorrespondingly to the stripe structures on the parallel inner surfaces,and the glue materials are respectively applied between the outerannular surface and the corresponding stripe structure.

In detail, FIG. 11 is a schematic view of applying the glue material 150according to the 1st embodiment, and FIG. 1J is another schematic viewof applying the glue material 150 according to the 1st embodiment. InFIG. 11 and FIG. 1J, the outer annular surface 130 of the opticalelement 122 is disposed correspondingly to the stripe structures 199,and there is a gap between the outer annular surface 130 and each of thestripe structures 199. In the 1st embodiment, a needle 154 is used toapply the glue material 150, wherein an assembly platform 158 is used toassist to place the optical elements 111-122 into the plastic barrel160, and the plastic barrel 160 is placed on the assembly platform 158while the outer image-end surface 180 faces an upward direction.

The assembly platform 158 can be a fixed fixture for a single imaginglens module or an array of fixing plates for a plurality of imaging lensmodules for fixing the imaging lens module 100. The needle 154 is placedabove the gap between the outer annular surface 130 and the stripestructures 199, and there is a degree of freedom between the assemblyplatform 158 and the needle 154 to control the application location ofthe glue material 150 via relative movements or relative rotations toapply the glue material 150 between the outer annular surface 130 andthe stripe structures 199.

When the needle 154 is used to apply the glue material 150 being in aflow state to the gap between the outer annular surface 130 and each ofthe stripe structures 199, the glue material 150 will downwardly spreadto the gap between the outer annular surface 130 and each of the stripestructures 199. Meanwhile, the glue material 150 will spread to theinner tube surface 190 and the surface of the optical element 122 facingthe needle 154 to fix the optical elements 111-122 in the plastic barrel160. Furthermore, according to the imaging lens module 100 of thepresent disclosure, by applying the glue material 150 between the outerannular surface 130 and the stripe structures 199, the glue material 150can be prevented from partially overflowing to cause bumps or sparklingtraces of a large area of the glue material 150 on the inner tubesurface 190 and the surface of the optical element 122 facing the needle154 to affect the appearance of the imaging lens module 100.

In the 1st embodiment, the application location of the glue material 150is controlled via the rotations of the assembly platform 158 relative tothe needle 154. In other embodiments (not shown), the applicationlocation of the glue material 150 can be controlled via the rotations ofthe needle 154 relative to the assembly platform 158 or the relativemovements between the assembly platform 158 and the needle 154, but thepresent disclosure is not limited thereto. Moreover, the glue material150 is not limited to be applied by the needle 154.

In FIG. 1E to FIG. 1G, the stripe structures 199 and the plastic barrel160 can be formed integrally. Accordingly, the plastic barrel 160 can beapplicable for mass productions.

A length direction of each of the stripe structures 199 can be parallelto the optical axis of the imaging lens module 100. Accordingly, theplastic barrel 160 can be manufactured by an injection molding methodmore easily. In the 1st embodiment, a length direction of each of thestripe structures 199 is parallel to the optical axis of the imaginglens module 100. In other embodiments (not shown), the length directionof each of the stripe structures is not parallel to the optical axis ofthe imaging lens module, i.e., the length direction of each of thestripe structures can rotate relatively to the optical axis along theparallel inner surfaces thereof, and the stripe structures are regularlyarranged along a circumferential direction of the parallel innersurfaces.

Each of the stripe structures 199 includes a light diminishing surface197, wherein when a surface roughness of the light diminishing surface197 is Ra, the following condition can be satisfied: 0.1 μm<Ra<4.0 μm.Accordingly, the application of the glue material 150 can be facilitatedto prevent the dispensing quality from being affected by the variationof the glue volume of the glue material 150. Furthermore, each of thelight diminishing surfaces 197 can be disposed on all or part ofsurfaces of each of the stripe structures 199. When the needle 154 isused to apply the glue material 150 being in the flow state to the gapbetween the outer annular surface 130 and each of the stripe structures199, it is difficult for the glue material 150 to continuously spreadover the light diminishing surface 197 of the stripe structure 199, andhence the application range of the glue material 150 can be controlledwhile preventing the glue material 150 from overflowing to otherunnecessary places of the imaging lens module 100.

In FIG. 1B, the outer annular surface 130 of the optical element 122disposed correspondingly to the stripe structures 199 can contact withat least one of the stripe structures 199. Accordingly, the efficiencyof applying the glue material 150 can be improved, and the uniformapplication of the glue material 150 can be facilitated. In the 1stembodiment, the outer annular surface 130 can contact with part of thestripe structures 199, i.e., the outer annular surface 130 can beagainst part of the stripe structures 199. The outer annular surface 130can also contact with all of the stripe structures 199, i.e., the outerannular surface 130 can be against all of the stripe structures 199.

In FIG. 1E and FIG. 1F, the stripe structures 199 can be disposed merelyon one parallel inner surface 195. Accordingly, the automation equipmentfor applying the glue material 150 will be facilitated to identify thelocation of the stripe structure 199 easily.

The number of the stripe structures 199 on the aforementioned parallelinner surface 195 can range between 80 and 300. Accordingly, the stripestructures 199 being densely arranged facilitate the uniform applicationof the glue material 150.

In FIG. 1G, when a protruded height of any one of the stripe structures199 is d, the following condition can be satisfied: 2 μm<d<30 μm.Accordingly, the stripe structures 199 have proper depths, and the massproductions and the dispensing quality can be balanced. Preferably, thefollowing condition can be satisfied: 2 μm<d<15 μm. In the 1stembodiment, the value of the parameter d of all of the stripe structures199 can be the same or similar.

When a protruded height of any one of the stripe structures 199 is d,and a width of the any one of the stripe structures 199 is w, thefollowing condition can be satisfied: 0<d/w<0.50. Accordingly, thestripe structures 199 being properly and densely arranged facilitate toreduce the manufacturing difficulty of the plastic barrel 160.Preferably, the following condition can be satisfied: 0<d/w<0.35. In the1st embodiment, the value of the parameter d of all of the stripestructures 199 can be the same or similar, the value of the parameter wcan be the same or similar as well, and the spacing between any two ofthe adjacent stripe structures 199 can be the same or similar. Further,according to the imaging lens module of the present disclosure, the wayof the stripe structures being regularly arranged along thecircumferential direction of the parallel inner surface is not limitedby the value of the parameter d, the value of the parameter w, and thespacing being the same or similar, but the stripe structures can bearranged periodically as well.

In FIG. 1F, the number of the parallel inner surfaces 195 of the innertube surface 190 can be at least 6. Accordingly, the plastic barrel 160can be facilitated to contain more optical elements to promote theoptical quality of the imaging lens module 100. In the 1st embodiment,the number of the parallel inner surfaces 195 of the inner tube surface190 is 8.

The location of a maximum outer diameter of the plastic barrel 160 canbe near the outer image-end surface 180, and the maximum outer diameterof the plastic barrel 160 can be greater than a distance parallel to theoptical axis between the outer object-end surface 170 and the outerimage-end surface 180. Accordingly, the mechanical design of the imaginglens module 100 can be applicable to the specification of highmodulation transfer function (MTF). In the 1st embodiment, the locationof the maximum outer diameter of the plastic barrel 160 is near theouter image-end surface 170, the maximum outer diameter of the plasticbarrel 160 is 14.1 mm, and the distance parallel to the optical axisbetween the outer object-end surface 170 and the outer image-end surface180 is 8.9 mm, and hence the maximum outer diameter of the plasticbarrel 160 is greater than the distance parallel to the optical axisbetween the outer object-end surface 170 and the outer image-end surface180.

In FIG. 1A, the object-end opening 173 of the plastic barrel 160 can bean aperture stop of the optical lens assembly 110. Accordingly, thecomplexity of the mechanical design of the imaging lens module 100 canbe facilitated to be reduced. In the 1st embodiment, object-end opening173 of the plastic barrel 160 is the aperture stop of the optical lensassembly 110.

In FIG. 1A and FIG. 1G, the optical element 122 being disposedcorrespondingly to the stripe structures 199 is a spacer. The opticalelement 122 includes a hole 140, and the optical axis of the imaginglens module 100 passes through the hole 140.

The outer image-end surface 180 is closer to the optical element 122being disposed correspondingly to the stripe structure 199 than theouter object-end surface 170 is to the optical element 122 beingdisposed correspondingly to the stripe structure 199. Accordingly, it isapplicable to the mechanical configuration of the lens with short backfocal length (e.g., the imaging lens module 100).

Please also see the following Table 1, which lists the data definedbased on the aforementioned parameters of the imaging lens module 100 ofthe 1st embodiment as illustrated in FIG. 1G.

TABLE 1 1st embodiment Ra (μm) 0.56~0.8 w (μm) 56.76 d (μm) 5.0 d/w0.088

2nd Embodiment

FIG. 2A is a schematic view of an imaging lens module 200 according tothe 2nd embodiment of the present disclosure. In FIG. 2A, the imaginglens module 200 includes an optical lens assembly 210, a plastic barrel260, and a glue material 250. The imaging lens module 200 can furtherinclude a filter (not shown) and an image surface (not shown).

The optical lens assembly 210 includes a plurality of optical elements212-221, and the optical elements 212-221 are disposed in the plasticbarrel 260 and arranged along an optical axis of the imaging lens module200. In the 2nd embodiment, the optical lens assembly 210 includes, froman object side to an image side, the optical elements 212, 213, 214,215, 216, 217, 218, 219, 220, and 221, and the optical elements 212-221are disposed in the plastic barrel 260 and arranged along an opticalaxis, wherein the optical elements 213, 215, 217, 219 and 221 are lenselements, the optical elements 214, 216, 218, and 220 are light blockingsheets, and the optical element 212 is a spacer.

FIG. 2B is a schematic view of the plastic barrel 260 according to the2nd embodiment, and FIG. 2C is a plane view of the plastic barrel 260according to the 2nd embodiment. In FIG. 2A to FIG. 2C, the plasticbarrel 260 includes an outer object-end surface 270, an outer image-endsurface 280, and an inner tube surface 290. The outer object-end surface270 is a surface of the plastic barrel 260 facing an imaged object (notshown), and the outer object-end surface 270 surrounds an object-endopening 273. The outer image-end surface 280 is a surface of the plasticbarrel 260 facing an image surface, and the outer image-end surface 280surrounds an image-end opening 283. The inner tube surface 290 connectsthe outer object-end surface 270 and the outer image-end surface 280,and faces the optical axis of the imaging lens module 200. The innertube surface 290 includes a plurality of parallel inner surfaces 295,and vertical distances between all locations of each of the parallelinner surfaces 295 and the optical axis are the same. A plurality ofstripe structures 299 are disposed on and protruded from at least one ofthe parallel inner surfaces 295 in a round angle, and the stripestructures 299 are regularly arranged along a circumferential directionof the parallel inner surfaces 295. The outer annular surface 230 of theoptical element 212 is disposed correspondingly to the stripe structure299. The glue material 250 is applied among the outer annular surface230 and the stripe structures 299, or it can also be said that the gluematerial 250 is applied among the outer annular surface 230, the stripestructures 299 and the aforementioned parallel inner surface 295.

In detail, the stripe structures 299 and the plastic barrel 260 areformed integrally, and a length direction of each of the stripestructures 299 is parallel to the optical axis of the imaging lensmodule 200. Each of the stripe structures 299 includes light diminishingsurfaces 297, and each of the light diminishing surfaces 297 is disposedon all surfaces of each of the stripe structures 299. The outer annularsurface 230 of the optical element 212 being disposed correspondingly tothe stripe structures 299 contacts with at least one of the stripestructures 299. All of the stripe structures 299 have the same value ofparameter d, and so as the value of parameter w. The number of thestripe structures 299 on the aforementioned parallel inner surfaces 295ranges between 80 and 300. Furthermore, the number of the parallel innersurfaces 295 of the inner tube surface 290 is 7.

In the 2nd embodiment, the optical element 212 disposed correspondinglyto the stripe structures 299 is a spacer. The optical element 212includes a hole 240. The optical axis of the imaging lens module 200passes through the hole 240, and the hole 240 is an aperture stop of theoptical lens assembly 210. Accordingly, it is applicable to themechanical configuration of the lens assembly with long focal length(e.g., the imaging lens module 200).

The outer object-end surface 270 is closer to the optical element 212disposed correspondingly to the stripe structures 299 than the outerimage-end surface 280 is to the optical element 212 being disposedcorrespondingly to the stripe structure 299. Accordingly, it isapplicable to the mechanical configuration of the lens assembly withlong back focal length (e.g., the imaging lens module 200).

The following Table 2 lists the data of the parameters Ra, d, w, and d/wof the imaging lens module 200 of the 2nd embodiment, and the definitionof each of the parameters is the same as those of the imaging lensmodule 100 of the 1st embodiment as illustrated in FIG. 2C.

TABLE 2 2nd embodiment Ra (μm) 1.6~3.15 w (μm) 56.77 d (μm) 10.03 d/w0.177

3rd Embodiment

FIG. 3A is a schematic view of an imaging lens module 300 according tothe 3rd embodiment of the present disclosure. In FIG. 3A, the imaginglens module 300 includes an optical lens assembly 310, a plastic barrel360, and a glue material 350. The imaging lens module 300 can furtherinclude a filter (not shown) and an image surface (not shown).

The optical lens assembly 310 includes a plurality of optical elements311-321, and the optical elements 311-321 are disposed in the plasticbarrel 360 and arranged along an optical axis of the imaging lens module300. In the 3rd embodiment, the optical lens assembly 310 includes, froman object side to an image side, the optical elements 311, 312, 313,314, 315, 316, 317, 318, 319, 320, and 321, and the optical elements311-321 are disposed in the plastic barrel 360 and arranged along theoptical axis, wherein the optical elements 311, 313, 315, 317, 319, and321 are lens elements, and the optical elements 312, 314, 316, 318, and320 are light blocking sheets.

FIG. 3B is a schematic view of the plastic barrel 360 according to the3rd embodiment, and FIG. 3C is a plane view of the plastic barrel 360according to the 3rd embodiment. In FIG. 3A to FIG. 3C, the plasticbarrel 360 includes an outer object-end surface 370, an outer image-endsurface 380, and an inner tube surface 390. The outer object-end surface370 is a surface of the plastic barrel 360 facing an imaged object (notshown), and the outer object-end surface 370 surrounds an object-endopening 373. The outer image-end surface 380 is a surface of the plasticbarrel 360 facing an image surface, and the outer image-end surface 380surrounds an image-end opening 383. The inner tube surface 390 connectsthe outer object-end surface 370 and the outer image-end surface 380 andfaces the optical axis of the imaging lens module 300. The inner tubesurface 390 includes a plurality of parallel inner surfaces 395, andvertical distances between all locations of each of the parallel innersurfaces 395 and the optical axis are the same. A plurality of stripestructures 399 are disposed on and protruded from one of the parallelinner surfaces 395, the parallel inner surfaces 395 between the adjacentstripe structures 399 have an arc feature being slightly recessed, andthe stripe structures 399 are regularly arranged along a circumferentialdirection of the parallel inner surfaces 395. The outer annular surface330 of the optical element 321 is disposed correspondingly to the stripestructures 399. The glue material 350 is applied among the outer annularsurface 330 and the stripe structures 399, or it can also be said thatthe glue material 350 is applied among the outer annular surface 330,the stripe structures 399 and the aforementioned parallel inner surfaces395.

In detail, the stripe structures 399 and the plastic barrel 360 areformed integrally, a length direction of each of the stripe structures399 is parallel to the optical axis of the imaging lens module 300. Eachof the stripe structures 399 includes light diminishing surfaces 397,and each of the light diminishing surfaces 397 is disposed on allsurfaces of each of the stripe structures 399. The outer annular surface330 of the optical element 312 being disposed correspondingly to thestripe structures 399 contacts with at least one of the stripestructures 399. All of the stripe structures 399 have the same value ofparameter d, and so as the value of parameter w. The number of thestripe structures 399 on the aforementioned parallel inner surfaces 395ranges between 80 and 300.

Furthermore, the number of the parallel inner surfaces 395 of the innertube surface 390 is 8. The location of a maximum outer diameter of theplastic barrel 360 is near the outer image-end surface 380, and themaximum outer diameter of the plastic barrel 360 can be greater than adistance parallel to the optical axis between the outer object-endsurface 370 and the outer image-end surface 380. The object-end opening373 of the plastic barrel 360 is an aperture stop of the optical lensassembly 310. The outer image-end surface 380 is closer to the opticalelement 321 being disposed correspondingly to the stripe structures 399than the outer object-end surface 370 is to the optical element 321being disposed correspondingly to the stripe structure 399.

In the 3rd embodiment, the optical element 321 disposed correspondinglyto the stripe structures 399 is a lens element. Accordingly, the numberof the optical elements in the imaging lens module 300 and the cost canbe reduced effectively.

The following Table 3 lists the data of the parameters Ra, d, w, and d/wof the imaging lens module 300 of the 3rd embodiment, and the definitionof each of the parameters is the same as those of the imaging lensmodule 100 of the 1st embodiment as illustrated in FIG. 3C.

TABLE 3 3rd embodiment Ra (μm) 0.8~2.24 w (μm) 52.89 d (μm) 6.94 d/w0.131

4th Embodiment

FIG. 4A is a schematic view of an imaging lens module 400 according tothe 4th embodiment of the present disclosure. In FIG. 4A, the imaginglens module 400 includes an optical lens assembly 410, a plastic barrel460, and a glue material 450. The imaging lens module 400 can furtherinclude a filter (not shown) and an image surface (not shown).

The optical lens assembly 410 includes a plurality of optical elements411-422, and the optical elements 411-422 are disposed in the plasticbarrel 460 and arranged along an optical axis of the imaging lens module400. In the 4th embodiment, the optical lens assembly 410 includes, froman object side to an image side, the optical elements 411, 412, 413,414, 415, 416, 417, 418, 419, 420, 421, and 422, and the opticalelements 411-422 are disposed in the plastic barrel 460 and arrangedalong the optical axis, wherein the optical elements 411, 413, 415, 417,419, and 421 are lens elements, the optical elements 412, 414, 416, 418,and 420 are light blocking sheets, and the optical element 422 is aspacer.

FIG. 4B is a schematic view of the plastic barrel 460 according to the4th embodiment, and FIG. 4C is a plane view of the plastic barrel 460according to the 4th embodiment. In FIG. 4A to FIG. 4C, the plasticbarrel 460 includes an outer object-end surface 470, an outer image-endsurface 480, and an inner tube surface 490. The outer object-end surface470 is a surface of the plastic barrel 460 facing an imaged object (notshown), and the outer object-end surface 470 surrounds an object-endopening 473. The outer image-end surface 480 is a surface of the plasticbarrel 460 facing an image surface, and the outer image-end surface 480surrounds an image-end opening 483. The inner tube surface 490 connectsthe outer object-end surface 470, and the outer image-end surface 480and faces the optical axis of the imaging lens module 400. The innertube surface 490 includes a plurality of parallel inner surfaces 495,and vertical distances between all locations of each of the parallelinner surfaces 495 and the optical axis are the same. A plurality ofstripe structures 499 are disposed on and protruded from one of theparallel inner surfaces 495, a cross-section of each of the stripestructures 499 appears to be a trapezoid with a wide bottom and a narrowtop, and the stripe structures 499 are regularly arranged along acircumferential direction of the parallel inner surfaces 495. The outerannular surface 430 of the optical element 422 is disposedcorrespondingly to the stripe structures 499. The glue material 450 isapplied among the outer annular surface 430 and the stripe structures499, or it can also be said that the glue material 450 is applied amongthe outer annular surface 430, the stripe structures 499 and theaforementioned parallel inner surfaces 495.

In detail, the stripe structures 499 and the plastic barrel 460 areformed integrally, a length direction of each of the stripe structures499 is parallel to the optical axis of the imaging lens module 400. Eachof the stripe structures 499 includes light diminishing surfaces 497,and each of the light diminishing surfaces 497 is disposed on allsurfaces of each of the stripe structures 499. The outer annular surface430 of the optical element 412 being disposed correspondingly to thestripe structures 499 contacts with at least one of the stripestructures 499. All of the stripe structures 499 have the same value ofparameter d, and so as the value of parameter w. The number of thestripe structures 499 on the aforementioned parallel inner surfaces 495ranges between 80 and 300.

Furthermore, the number of the parallel inner surfaces 495 of the innertube surface 490 is 8. The location of a maximum outer diameter of theplastic barrel 460 is near the outer image-end surface 480, and themaximum outer diameter of the plastic barrel 460 can be greater than adistance parallel to the optical axis between the outer object-endsurface 470 and the outer image-end surface 480. The object-end opening473 of the plastic barrel 460 is an aperture stop of the optical lensassembly 410. The outer image-end surface 480 is closer to the opticalelement 422 being disposed correspondingly to the stripe structures 499than the outer object-end surface 470 is to the optical element 422being disposed correspondingly to the stripe structures 499.

The optical element 422 disposed correspondingly to the stripestructures 499 is a spacer. The optical element 422 includes a hole 440.The optical axis of the imaging lens module 400 passes through the hole440.

The following Table 4 lists the data of the parameters Ra, d, w, and d/wof the imaging lens module 400 of the 4th embodiment, and the definitionof each of the parameters is the same as those of the imaging lensmodule 100 of the 1st embodiment as illustrated in FIG. 4C.

TABLE 4 4th embodiment Ra (μm) 0.4~1.12 w (μm) 62.58 d (μm) 10.03 d/w0.160

5th Embodiment

FIG. 5A is a schematic view of an imaging lens module 500 according tothe 5th embodiment of the present disclosure, FIG. 5B is across-sectional view according to the cross-sectional line 5B-5B of FIG.5A, and FIG. 5C is a cross-sectional view according to thecross-sectional line 5C-5C of FIG. 5A. In FIG. 5A to FIG. 5C, theimaging lens module 500 includes an optical lens assembly 510, a plasticbarrel 560, and a glue material 550. The imaging lens module 500 canfurther include a filter (not shown) and an image surface (not shown).

FIG. 5D is an exploded view of the plastic barrel 560 and the opticallens assembly 510 according to the 5th embodiment. In FIG. 5A and FIG.5D, the optical lens assembly 510 includes a plurality of opticalelements 512-521, and the optical elements 512-521 are disposed in theplastic barrel 560 and arranged along an optical axis of the imaginglens module 500. In the 5th embodiment, the optical lens assembly 510includes, from an object side to an image side, the optical elements512, 513, 514, 515, 516, 517, 518, 519, 520, and 521, and the opticalelements 512-521 are disposed in the plastic barrel 560 and arrangedalong the optical axis, wherein the optical elements 513, 515, 517, 519,and 521 are lens elements, the optical elements 514, 516, 518, and 520are light blocking sheets, and the optical element 512 is a spacer.

The plastic barrel 560 includes an outer object-end surface 570, anouter image-end surface 580, and an inner tube surface 590. The outerobject-end surface 570 is a surface of the plastic barrel 560 facing animaged object (not shown), and the outer object-end surface 570surrounds an object-end opening 573. The outer image-end surface 580 isa surface of the plastic barrel 560 facing an image surface, and theouter image-end surface 580 surrounds an image-end opening 583. Theinner tube surface 590 connects the outer object-end surface 570 and theouter image-end surface 580 and faces the optical axis of the imaginglens module 500. The inner tube surface 590 includes a plurality ofparallel inner surfaces 595, and vertical distances between alllocations of each of the parallel inner surfaces 595 and the opticalaxis are the same.

FIG. 5E is a 3-D view of the optical element 512 according to the 5thembodiment, and FIG. 5F is a plane view of FIG. 5E. A plurality ofstripe structures 599 are disposed on and protruded from an outerannular surface 530 of the optical element 512 in the optical lensassembly 510, and the stripe structures 599 are regularly arranged alonga circumferential direction of the outer annular surface 530.

According to the 5th embodiment of FIG. 5F, each of the stripestructures 599 protrudes from the outer annular surface 530 in an anglenearly vertical. Depending on the molding and release properties of thestripe structures 599, each of the stripe structures 599 can alsoprotrude from the outer annular surface 530 in a round angle, or theouter annular surfaces 530 between the adjacent stripe structures 599have an arc feature being slightly recessed. Alternatively, across-section of each of the stripe structures 599 appears to be atrapezoid with a wide bottom and a narrow top, but the disclosure is notlimited thereto.

In FIG. 5B and FIG. 5D, one of the parallel inner surfaces 595 in theplastic barrel 560 is disposed correspondingly to the stripe structure599, or it can also be said that the stripe structure 599 is disposedcorrespondingly to the aforementioned one of the parallel inner surfaces595. The glue material 550 is applied among the one of the parallelinner surfaces 595 and the stripe structures 599, or it can also be saidthat the glue material 550 is applied among the one of the parallelinner surfaces 595, the stripe structures 599, and the outer annularsurface 530, wherein the glue material 550 is an adhesive whose materialis not limited. Accordingly, the application range control of the gluematerial 550 and the uniform application of the glue material 550 can befacilitated, and the demands of mass productions of the imaging lensmodule 500 can be satisfied. In addition, the appearance of the imaginglens module 500 can be prevented from being affected by the bumps causedby the partially overflowed glue material 550.

Moreover, FIG. 5G is another 3-D view of the optical element 513according to the 5th embodiment, and FIG. 5H is a plane view of FIG. 5G.A plurality of the stripe structures 593 can be disposed on and protrudefrom the outer annular surface 533 of the optical element 513 in theoptical lens assembly 510 in an angle nearly vertical, and the stripestructures 593 are regularly arranged along a circumferential directionof the outer annular surface 533.

In FIG. 5C and FIG. 5D, another of the parallel inner surfaces 595 inthe plastic barrel 560 is disposed correspondingly to the stripestructures 593, or it can also be said that the stripe structures 593are disposed correspondingly to the other of the parallel inner surfaces595. The glue material 550 is applied among the other of the parallelinner surfaces 595 and the stripe structures 593, or it can also be saidthat the glue material 550 is applied among the other of the parallelinner surfaces 595, the stripe structures 593, and the outer annularsurface 533.

FIG. 5I is a schematic view of the stripe structures 593, 599, and theplastic barrel 560 according to the 5th embodiment. According to the 5thembodiment of FIG. 5A to FIG. 5C and FIG. 5I, the plurality of thestripe structures 599 and 593 are respectively disposed on and protrudedfrom the outer annular surfaces 530 and 533 of two optical elements 512and 513 in the optical lens assembly 510, and the aforementioned twoparallel inner surfaces 595 are disposed correspondingly to the stripestructures 599 and 593, respectively. The glue material 550 is appliedamong the aforementioned two parallel inner surfaces 595 and the stripestructures 599 and 593. That is, the glue material 550 spreads from thespace between the stripe structures 599 and the corresponding parallelinner surfaces 595 to the space between the stripe structures 593 andthe corresponding parallel inner surfaces 595. Accordingly, the stripestructures 599 and 593 being respectively disposed on the outer annularsurfaces 530 and 533 of the two optical elements 512 and 513 facilitateto absorb more glue material 550, such that the appearance of theimaging lens module 500 can be neater, and the yield of the appearancetest can be improved.

In detail, in FIG. 5E to FIG. 5H, the stripe structures 599 and theoptical element 512 can be formed integrally, and the stripe structures593 and the optical element 513 can be formed integrally. Accordingly,the optical elements 512 and 513 can be applicable to mass productions.to The number of the stripe structures 599 on the outer annular surface530 can range between 80 and 300, and the number of the strip structures593 on the outer annular surface 533 ranges between 80 and 300.Accordingly, the stripe structures 599 and 593 being densely arrangedfacilitate the uniform application of the glue material 550.

In FIG. 5F and FIG. 5H, when a protruded height of any one of the stripestructures 599 is d, the following condition can be satisfied: 2 μm<d<15μm; when a protruded height of any one of the stripe structures 593 isd, the following condition can be satisfied: 2 μm<d<15 μm. Accordingly,the stripe structures 599 and 593 have proper depths, and the massproductions and the dispensing quality can be balanced. In the 5thembodiment, the value of the parameter d of all of the stripe structures599 and 593 can be the same or similar.

When a protruded height of any one of the stripe structures 599 is d,and a width of the any one of the stripe structures 599 is w, thefollowing condition can be satisfied: 0<d/w<0.50; when a protrudedheight of any one of the stripe structures 593 is d, and a width of theany one of the stripe structures 593 is w, the following condition canbe satisfied: 0<d/w<0.50. Accordingly, the stripe structures 599 and 593being properly and densely arranged facilitate to reduce themanufacturing difficulty of the optical elements 512 and 513. In the 5thembodiment, the value of the parameter d of all of the stripe structures599 and 593 can be the same or similar, the value of the parameter w canbe the same or similar as well, and the spacing between any two of theadjacent stripe structures 599 and the spacing between any two of theadjacent stripe structures 593 can be the same or similar. Further,according to the imaging lens module of the present disclosure, the wayof the stripe structures being regularly arranged along thecircumferential direction of the parallel inner surface is not limitedby the value of the parameter d, the value of the parameter w, and thespacing being the same or similar, but the stripe structures can bearranged periodically as well.

In FIG. 5A and FIG. 5E, the optical element 512 disposed with the stripestructures 599 is a spacer. The optical element 512 includes a hole 540.The optical axis of the imaging lens module 500 passes through the hole540, and the hole 540 is an aperture stop of the optical lens assembly510. Accordingly, it is applicable to the mechanical configuration ofthe lens assembly with long focal length (e.g., the imaging lens module500).

In FIG. 5A and FIG. 5G, the optical element 513 disposed with the stripestructures 593 is a lens element. Accordingly, the number of the opticalelements in the imaging lens module 500 and the cost can be reduced.

In FIG. 5A and FIG. 5D, the outer object-end surface 570 of the plasticbarrel 560 can be closer to the optical element 512 disposed with thestripe structures 599 and the optical element 513 disposed with thestripe structures 593 than the outer image-end surface 580 is thereto.Accordingly, it is applicable to the mechanical configuration of thelens assembly with long back focal length (e.g., the imaging lens module500).

In addition, in the 5th embodiment, a length direction of each of thestripe structures 599 and 593 is parallel to the optical axis of theimaging lens module 500. Each of the stripe structures 599 and 593 canrespectively include a light diminishing surface (not labelledparticularly). The parallel inner surfaces 595 disposed correspondinglyto the stripe structures 599 contacts with at least one of the stripestructures 599, and the parallel inner surfaces 595 disposedcorrespondingly to the stripe structures 593 contacts with at least oneof the stripe structures 593.

The following Table 5-1 and Table 5-2 respectively list the data definedaccording to the aforementioned parameters of the stripe structures 599and 593 of the imaging lens modules 500 of the 5th embodiment asrespectively illustrated in FIG. 5F and FIG. 5H.

TABLE 5-1 (the stripe structures 599 in the 5th embodiment) d (μm) 5 d/w0.133 w (μm) 37.61

TABLE 5-2 (the stripe structures 593 in the 5th embodiment) d (μm) 5 d/w0.133 w (μm) 37.61

6th Embodiment

FIG. 6A is a schematic view of an electronic device 60 according to the6th embodiment of the present disclosure, and FIG. 6B is anotherschematic view of the electronic device 60 according to the 6thembodiment of the present disclosure. In FIG. 6A and FIG. 6B, theelectronic device 60 of the 6th embodiment is a smartphone. Theelectronic device 60 includes the imaging lens module 600 of the presentdisclosure and an image sensor 62, wherein the image sensor 62 isdisposed on the image surface (not shown) of the imaging lens module600. Accordingly, the demands of the current electronic device market tothe mass productions and the appearances of the imaging lens module canbe satisfied.

Specifically, a user activates a capturing mode via the user interface69 of the electronic device 60, wherein the user interface 69 in the 6thembodiment can be a touch screen 69a and a button 69b, etc. At thistime, the imaging lens module 600 converges the imaging light on theimage sensor 62 and outputs the electronic signals associated with theimage to the image signal processor (ISP) 68.

FIG. 6C is a block view of the electronic device 60 according to the 6thembodiment, in particular, the block view of the camera in theelectronic device 60. In FIG. 6A to FIG. 6C, the electronic device 60can further include an auto focus component 63 and an optical anti-shakecomponent 64 in response to the camera specification of the electronicdevice 60. Moreover, the electronic device 60 can further include atleast one auxiliary optical element 67 and at least one sensing element66. The auxiliary optical element 67 can be flash modules, infrareddistance measurement components, laser focus modules and modules forcompensating for color temperatures. The sensing element 66 can havefunctions for sensing physical momentum and kinetic energies, such as anaccelerator, a gyroscope, and a hall effect element, to sense shaking orjitters applied by hands of the user or external environments. As aresult, the auto focus component 63 and the optical anti-shake component64 disposed on the electronic device 60 can function to obtain greatimaging qualities and facilitate the electronic device 60 according tothe present disclosure to have a capturing function with multiple modes,such as taking optimized selfies, high dynamic range (HDR) with a lowlight source, 4K resolution recording, etc. Additionally, the user canvisually see the captured image of the camera through the touch screenand manually operate the view finding range on the touch screen toachieve the auto focus function of what you see is what you get.

Furthermore, in FIG. 6B, the imaging lens module 600, the image sensor62, the auto focus component 63, the optical anti-shake component 64,the sensing element 66, and the auxiliary optical element 67 can bedisposed on a flexible printed circuitboard (FPC) 97 and electricallyconnected with the associated elements, such as an imaging signalprocessing element 68, via a connector 98 to perform a capturingprocess. Since the current electronic devices, such as smartphones, havea tendency of being light and thin, the way of firstly disposing theimaging lens module and related elements on the flexible printedcircuitboard and secondly integrating the circuit into the main board ofthe electronic device via the connector can satisfy the mechanicaldesign of the limited space inside the electronic device and the layoutrequirements and obtain more margins. The auto focus function of theimaging lens module can be controlled more flexibly via the touch screenof the electronic device. In the 6th embodiment, the electronic device60 includes a plurality of sensing elements 66 and a plurality ofauxiliary optical elements 67. The sensing elements 66 and the auxiliaryoptical elements 67 are disposed on the flexible printed circuitboard 97and at least one other flexible printed circuitboard (not labelledparticularly) and electrically connected with the associated elements,such as an imaging signal processing element 68, via correspondingconnectors to perform a capturing process. In other embodiments (notshown), the sensing elements and the auxiliary optical elements can alsobe disposed on the main board of the electronic device or carrier boardsin other forms according to requirements of the mechanical design andthe circuit layout.

In addition, the electronic device 60 can further include, but not belimited to, a display, a control unit, a storage unit, a random accessmemory, a read-only memory, or the combination thereof.

7th Embodiment

FIG. 7 is a schematic view of an electronic device 70 according to the7th embodiment of the present disclosure. The electronic device 70 ofthe 7th embodiment is a tablet, and the electronic device 70 includes animaging lens module 700 according to the present disclosure and an imagesensor (not shown), wherein the image sensor is disposed on an imagesurface (not shown) of the imaging lens module 700.

8th Embodiment

FIG. 8 is a schematic view of an electronic device 80 according to the8th embodiment of the present disclosure. The electronic device 80 ofthe 8th embodiment is a wearable device, and the electronic device 80includes an imaging lens module 800 according to the present disclosureand an image sensor (not shown), wherein the image sensor is disposed onan image surface (not shown) of the imaging lens module 800.

Although the present disclosure has been described in considerabledetail with reference to certain embodiments thereof, other embodimentsare possible. Therefore, the spirit and scope of the appended claimsshould not be limited to the description of the embodiments containedherein. It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentdisclosure without departing from the scope or spirit of the disclosure.In view of the foregoing, it is intended that the present disclosurecover modifications and variations of this disclosure provided they fallwithin the scope of the following claims.

What is claimed is:
 1. An imaging lens module, comprising: a plasticbarrel, comprising: an outer object-end surface being a surface of theplastic barrel facing an imaged object, and the outer object-end surfacesurrounding an object-end opening; an outer image-end surface being asurface of the plastic barrel facing an image surface, and the outerimage-end surface surrounding an image-end opening; and an inner tubesurface connecting with the outer object-end surface and the outerimage-end surface and facing an optical axis of the imaging lens module,wherein the inner tube surface comprises a plurality of parallel innersurfaces, a plurality of stripe structures are disposed on and protrudedfrom at least one of the parallel inner surfaces, and the stripestructures are regularly arranged along a direction orthogonal to theoptical axis of the imaging lens module; an optical lens assemblycomprising a plurality of optical elements disposed in the plasticbarrel and arranged along the optical axis, wherein an outer annularsurface of at least one of the optical elements is disposedcorrespondingly to the stripe structures; and a glue material appliedamong the outer annular surface and the stripe structures; wherein theouter image-end surface is closer to the at least one of the opticalelements disposed correspondingly to the stripe structures than theouter object-end surface is to the at least one of the optical elementsdisposed correspondingly to the stripe structures.
 2. The imaging lensmodule of claim 1, wherein the stripe structures are integrally formedwith the plastic barrel.
 3. The imaging lens module of claim 2, whereinthe outer annular surface of the at least one of the optical elementsdisposed correspondingly to the stripe structures contacts with at leastone of the stripe structures.
 4. The imaging lens module of claim 2,wherein the stripe structures are merely disposed on one of the parallelinner surfaces.
 5. The imaging lens module of claim 2, wherein a lengthdirection of each of the stripe structures is parallel to the opticalaxis.
 6. The imaging lens module of claim 2, wherein a number of thestripe structures on the parallel inner surfaces ranges between 80 and300.
 7. The imaging lens module of claim 2, wherein a protruded heightof any one of the stripe structures is d, and the following condition issatisfied:2 μm<d<30 μm.
 8. The imaging lens module of claim 7, wherein theprotruded height of any one of the stripe structures is d, and thefollowing condition is satisfied:2 μm<d<15 μm.
 9. The imaging lens module of claim 2, wherein a protrudedheight of any one of the stripe structures is d, a width of the any oneof the stripe structures is w, and the following condition is satisfied:0<d/w<0.50.
 10. The imaging lens module of claim 9, wherein theprotruded height of the any one of the stripe structures is d, the widthof the any one of the stripe structures is w, and the followingcondition is satisfied:0<d/w<0.35.
 11. The imaging lens module of claim 2, wherein the at leastone of the optical elements disposed correspondingly to the stripestructures comprises a lens element.
 12. The imaging lens module ofclaim 2, wherein the at least one of the optical elements disposedcorrespondingly to the stripe structures comprises a hole.
 13. Theimaging lens module of claim 2, wherein a location of a maximum outerdiameter of the plastic barrel is adjacent to the outer image-endsurface, and the maximum outer diameter of the plastic barrel is greaterthan a distance parallel to the optical axis between the outerobject-end surface and the outer image-end surface.
 14. An electronicdevice, comprising: the imaging lens module of claim 1; and an imagesensor disposed on the image surface of the imaging lens module.
 15. Animaging lens module, comprising: a plastic barrel, comprising: an outerobject-end surface being a surface of the plastic barrel facing animaged object, and the outer object-end surface surrounding anobject-end opening; an outer image-end surface being a surface of theplastic barrel facing an image surface, and the outer image-end surfacesurrounding an image-end opening; and an inner tube surface connectingwith the outer object-end surface and the outer image-end surface andfacing an optical axis of the imaging lens module, wherein the innertube surface comprises a plurality of parallel inner surfaces, aplurality of stripe structures are disposed on and protruded from atleast one of the parallel inner surfaces, and the stripe structures areregularly arranged along a direction orthogonal to the optical axis ofthe imaging lens module; an optical lens assembly comprising a pluralityof optical elements disposed in the plastic barrel and arranged alongthe optical axis, wherein an outer annular surface of at least one ofthe optical elements is disposed correspondingly to the stripestructures; and a glue material applied among the outer annular surfaceand the stripe structures; wherein the outer object-end surface iscloser to the at least one of the optical elements disposedcorrespondingly to the stripe structures than the outer image-endsurface is to the at least one of the optical elements disposedcorrespondingly to the stripe structures.
 16. The imaging lens module ofclaim 15, wherein the stripe structures are integrally formed with theplastic barrel.
 17. The imaging lens module of claim 16, wherein aprotruded height of any one of the stripe structures is d, and thefollowing condition is satisfied:2 μm<d<15 μm.
 18. The imaging lens module of claim 16, wherein aprotruded height of any one of the stripe structures is d, a width ofthe any one of the stripe structures is w, and the following conditionis satisfied:0<d/w<0.50.
 19. The imaging lens module of claim 16, wherein a number ofthe stripe structures on the outer annular surface ranges between 80 and300.
 20. The imaging lens module of claim 16, wherein the at least oneof the optical elements disposed correspondingly to the stripestructures comprises a lens element.
 21. An electronic device,comprising: the imaging lens module of claim 15; and an image sensordisposed on the image surface of the imaging lens module.